Oxygen Atom Exchange in Aqueous Solution by O- + H2O .fwdarw. OH- + OH and OH + H2O .fwdarw. H2O + OH. A Study of Hydrogen Atom Transfer

Kläning, Ulrik K.; Larsen, Elfinn; Sehested, Κ.

doi:10.1021/j100087a022

Cited by 12 publications

(8 citation statements)

References 9 publications

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“…22 There is, to the best of our knowledge, no In bulk water, O À is predicted to be the more stable isomer, 24,25 in contrast to previous experiments that favored OH OH À .…”

Section: Introductionmentioning

confidence: 87%

Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻

Lengyel

Ončák

Herburger

et al. 2017

Phys. Chem. Chem. Phys.

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“…22 There is, to the best of our knowledge, no In bulk water, O À is predicted to be the more stable isomer, 24,25 in contrast to previous experiments that favored OH OH À .…”

Section: Introductionmentioning

confidence: 87%

Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻

Lengyel

Ončák

Herburger

et al. 2017

Phys. Chem. Chem. Phys.

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“…16 The presence of hydrogen peroxide and water in the PEUU offers several pathways by which radicals can transfer rapidly into the PEUU from the surface. It is known that the hydroxyl radical transfers by reaction with water 17,18 :…”

Section: In Vitro Treatmentsmentioning

confidence: 99%

Role of oxygen in biodegradation of poly(etherurethane urea) elastomers

Schubert

Wiggins

Anderson

et al. 1997

J. Biomed. Mater. Res.

106

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It is generally accepted that biodegradation of poly(etheruethane urea) (PEUU) involves oxidation of the polyether segments on the surface where leukocytes are adhered. The influence of dissolved oxygen, which is known to control oxidation of polymers in more traditional environments, was explored in this study. Specimens treated in vitro with hydrogen peroxide-cobalt chloride for 12 days exhibited a brittle, degraded surface layer about 10 microm thick. Attenuated total reflectance-Fourier transform infrared spectroscopy of the surface revealed that the ether absorbance at 1110 cm(-1) gradually decreased with in vitro treatment time to 30% of its initial value after 12 days. In contrast, 6 days in vitro followed by 6 days in air produced a decrease to 12% of the initial volume. Therefore, removing a specimen from the in vitro solution after 6 days and exposing it to air for the remainder of the 12 days actually resulted in more oxidation than leaving it in the in vitro solution for the entire 12 days. These results suggest that PEUU degrades by an autooxidation mechanism sustained by oxygen. By successfully modeling the depth of the surface degraded layer with a diffusion-reaction model, it was demonstrated that PEUU biodegradation is controlled by diffusion of oxygen into the polymer.

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“…The gas phase reaction rate constant was determined 29 to be Ͻ1ϫ10 Ϫ15 cm 3 molecule Ϫ1 s Ϫ1 at 298 and 373 K. The rate of reaction ͑1͒ in solution, initiated by pulsed radiolysis, has also been investigated in conjunction with a study of the O Ϫ ϩH 2 O→OH Ϫ ϩOH reaction. 30 Reaction ͑2͒ has been more thoroughly investigated experimentally. Numerous measurements of the rate of reaction ͑2͒ over various temperature ranges [31][32][33][34][35][36][37][38][39][40] show that hydroxyl radical disproportionation has a non-Arhennius behavior.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of the transition state: Elementary reactions of the hydroxyl radical studied by photoelectron spectroscopy of O−(H2O) and H3O−2

Arnold

Neumark

1995

The Journal of Chemical Physics

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The transition state regions of the OHϩOH→O͑ 3 P͒ϩH 2 O and the OHϩH 2 O→H 2 OϩOH reactions are studied by photoelectron spectroscopy of the O Ϫ ͑H 2 O͒ and H 3 O 2 Ϫ anions and their deuterated analogs. The spectra show resolved vibrational progressions attributed to H-atom vibrational motion in the unstable neutral complexes formed by photodetachment. The positions and intensities of the peaks change markedly upon isotopic substitution. One-dimensional Franck-Condon calculations using ab initio potentials for the anion and neutral are used to interpret the peak spacings and intensities, as well as the strong isotopic effects. The results are discussed in the context of previously obtained transition state spectra for heavyϩlight-heavy reactions.

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Oxygen Atom Exchange in Aqueous Solution by O- + H2O .fwdarw. OH- + OH and OH + H2O .fwdarw. H2O + OH. A Study of Hydrogen Atom Transfer

Cited by 12 publications

References 9 publications

Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻

Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻

Role of oxygen in biodegradation of poly(etherurethane urea) elastomers

Spectroscopy of the transition state: Elementary reactions of the hydroxyl radical studied by photoelectron spectroscopy of O−(H2O) and H3O−2

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Oxygen Atom Exchange in Aqueous Solution by O- + H2O .fwdarw. OH- + OH and OH + H2O .fwdarw. H2O + OH. A Study of Hydrogen Atom Transfer

Cited by 12 publications

References 9 publications

Infrared spectroscopy of O˙− and OH− in water clusters: evidence for fast interconversion between O˙− and OH˙OH−

Infrared spectroscopy of O˙− and OH− in water clusters: evidence for fast interconversion between O˙− and OH˙OH−

Role of oxygen in biodegradation of poly(etherurethane urea) elastomers

Spectroscopy of the transition state: Elementary reactions of the hydroxyl radical studied by photoelectron spectroscopy of O−(H2O) and H3O−2

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Product

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Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻

Infrared spectroscopy of O˙⁻ and OH⁻ in water clusters: evidence for fast interconversion between O˙⁻ and OH˙OH⁻